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United States Patent |
5,053,089
|
Ristich
|
October 1, 1991
|
Tire repair plug
Abstract
A unitary threaded plug for emergency tire repair is provided, of
thermoplastic polymer composition, together with an optional pre-applied
coating of uintaite asphalt as an integral adhesive and leak sealant to be
activated by a small amount of waste oil from engine.
Inventors:
|
Ristich; James (294 Station Dr., Apt 1A, Wood Dale, IL 60191)
|
Appl. No.:
|
456173 |
Filed:
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December 26, 1989 |
Current U.S. Class: |
152/370; 156/97; 156/337; 206/582 |
Intern'l Class: |
B29C 073/06 |
Field of Search: |
152/370
156/95,97,337
206/582
81/15.5,15.7
|
References Cited
U.S. Patent Documents
570942 | Nov., 1896 | Merritt | 152/370.
|
684647 | Oct., 1901 | Madsen | 156/97.
|
3296048 | Jan., 1967 | Wolfe | 152/370.
|
4096901 | Jun., 1978 | Reichenbach | 152/370.
|
Primary Examiner: Ball; Michael W.
Assistant Examiner: Osele; Mark A.
Attorney, Agent or Firm: Gallagher; Paul H.
Claims
I claim:
1. A tire repair plug for use in repairing a hole in a tubeless pneumatic
tire, comprising,
a body constituting the greater portion of the length of the plug, and
tapered uniformly from a pointed end to a large end, the body being
covered with a coating of petroleum-soluble material,
a finger-gripper head at the large end of the body,
the plug being capable of being threaded into the hole in the tire by
manual force applied to the head, and the plug being of one piece and made
entirely of plastic, and being separable into parts at any position along
the length of the body, thereby, in the case of partial insertion of the
body into the hole to any position less than complete insertion and
leaving a part exposed exteriorly of the tire, enabling separation of the
exposed part from the inner part that remains in the hole, and that inner
part thereby constituting a plug effectively sealing the hole with an end
positioned closely adjacent the outer surface of the tire.
2. A tire repair plug according to claim 1 wherein, the coating is of
uintaite asphalt.
3. A method of repairing a tubeless pneumatic tire having a puncture hole
therein, comprising the steps,
(a) providing a uniformly tapered threaded plug with a finger-gripper head,
(b) applying a petroleum-dissolved material to the plug and drying it to
form a dry coating of such character as to enable the plug to be handled
in commerce, and
(c) applying the plug to the tire including the sub-steps,
(1) softening the coating with petroleum, and
(2) threading the plug into the hole while the coating is soft.
4. A method according to claim 3, wherein, step (b) is constituted by
utilizing uintaite asphalt as said material to form the coating.
5. A method according to claim 4, wherein, step (c) (1) is constituted by
utilizing motor oil to soften the coating.
Description
SUMMARY
I have invented a tire repair plug or device that constitutes an
improvement over devices in this field heretofore existing. It has a
unique tapered threaded shape that allows the motorist making the repair
to use as little or as much of the material of the plug as needed.
Repair can be made either by hand or with commonly available tools. The
device is suitable for use in punctures ranging from pinhole size up to
half an inch across.
One of the objects of the invention is to provide a repair plug for making
a quick repair to a tire in side-of-the-road self-rescue, without the need
for removing either the tire or the rim from the vehicle. Even when no
tool is at hand for driving the plug deep into the puncture, the user can
make a temporary repair using finger pressure alone, safely sealing the
leak until he can drive to where tools for a complete repair are at hand.
A further object of my invention is to provide a repair plug, the use of
which is simply and easily understood and by which the repairs can be
accomplished by persons of ordinary ability, with no special tools or
training and only modest strength of hand and arm, and which is durable
over the further life of the tire.
The drawing shows two particular forms of the unitary plug of the
invention. The plug may be provided selectively without a coating, or with
a coating, as will be disclosed below.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
FIG. 1 is a lateral view of the plug, shown partially inserted in a tire,
and before excess protruding material is removed, in a representative
punctured tire tread to which the plug is applied.
FIG. 2 is a lateral view of a variant form of the plug.
DETAILED DESCRIPTION
The unitary plug 1 is circular in cross-section and tapered over the
majority of its length to the finest practical point, at 2, forming a body
3. The untapered portion 4 at the top, or driving end, forms a head that
has a shallowly concave contour 5 of its lateral silhouette which gives
easy purchase for fingers to screw the plug into the puncture by hand.
In the plug of FIG. 2, the larger (untapered end portion, or head, has a
rather greater diameter than the maximum diameter of the tapered portion,
or body, affording increased mechanical advantage for torque applied with
the fingers alone and presenting a less easily deformable purchase for
such gripping tool as might in the alternative be used to apply torque.
The flat surface 6 of the head 4 may be provided with a recess 7 shaped for
engagement by a tool such as a phillips head screwdriver for screwing the
plug in.
The plug itself may by fabricated of any of the usual thermoplastic
polymers. An optional coating may be pre-applied in manufacture, as
referred to below, so that the repair procedure may omit a separate
adhesive application step.
If such a coating is to be provided, it is applied over the threaded
surface of the body 3. Preferably the black lustrous variety of asphalt
mined in Utah known as uintaite and sold under the trademark "Gilsonite",
is utilized, this being prepared by mixing the asphalt in equal parts by
volume with an organic solvent such as gasoline. After a short drying
time, the coated plugs are ready for packaging and storage.
In the use of the device with the dry asphalt coating thereon, the coating
can be re-softened by applying a small amount of oil, such as waste oil
from the vehicle's engine.
Repairs made with this system enhanced by application of a moderate amount
of rubber cement before insertion may be more leak-tight. However, the
difference is only marginal. The object of the pre-applied coating, when
used, is to provide means of safe self-rescue to the motorist, with a
minimum of equipment and procedural steps.
The plug is used by screwing it into the puncture opening in the tire 8 to
a satisfactory depth, and thereafter the user removes most of the excess
material of the plug left protruding outside the tire carcass, either by
nipping it off with side-cutter pliers, by cutting it off with a utility
knife, or by heating it with a match or a butane lighter, enough to soften
a portion near the tire tread surface, and then twisting off the remainder
with finger force, in any case leaving about one-quarter inch of material
protruding.
The plug may be extended through the steel belt 9 that is incorporated
originally in the tire, but does not suffer damage therefrom, but is
actually securely lodged thereby, because it may have undergone some
deformation of its originally circular cross section.
In the realization of the invention, it is to be understood that both the
devices of FIG. 1 and FIG. 2, and each selectively with or without the
pre-applied coating, are within the broad concept of the invention.
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